STOICHIOMETRY

stoichiometry, a term derived from the Greek words stoicheion=(meaning"element')
metron=(meaning "measure")

#Stoichometry is quantitative relation b/n reactant and product

It calculated based on principle

1. The formule must be written properly

2. The law of conservation of mass must be obeyed (mass of reactant mass of product)

Calculation based on chemical equation (Stoichometry problems)

1,Mass-mass problem
2,Volume volume problem
3,Mass-volume problem


1,Mass-mass relationship
A, Mass-ratio and
B. Mole-ratio

A,Mass ratio ratio
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Eg. How many garm of calcium chloride are formed when 15g of calcium metal reactes reacts with hydrochloric acid?

Ca+2HCL---> Cacla+ H2

(15g) Ca2+HCl --> (x)CaCl2 + H2

The molar mass of Ca is 40g/mol

The molar mass of CaCl2 is 111g/mol

15/40=x/110

X=15*110/40

X=416g of CaCl2 is produced


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